/// <summary>
/// Added a coordinate
/// </summary>
internal void AddedCoordinate(IList <Coordinate> coordinates, Coordinate lastCoordinate)
{
if (coordinates.Count == 1)
{
// Create the new dimBaseElement, which holds the direction
_baseElement = new DimBaseElement()
{
Start = lastCoordinate, End = lastCoordinate, Transform = this.Transform, CoordinateSystem = this.CoordinateSystem, CSUnitsPerPixel = _csUnitsPerPixel
};
// Force recalculation
_baseElement.RecalculateCurvesAndAnnotations(false);
_measureElements.Clear();
}
else if (coordinates.Count == 2)
{
// Set the base element's last coordinate
if (_baseElement != null)
{
_baseElement.End = lastCoordinate;
_baseElement.RecalculateCurvesAndAnnotations(true);
}
_measureElements.Clear();
}
else
{
// Add extra elements
if (_measureElements.Count > 0)
{
// Reverse the lot in case the added coordinate actually is invalid
// (invalid means it is placed before the last coordinate).
if (_measureElements.Count == 1 && !_measureElements[0].Valid)
{
Reverse();
}
var last = _measureElements[_measureElements.Count - 1];
last.End = lastCoordinate;
last.RecalculateCurvesAndAnnotations(true);
}
// Add the new element
Coordinate lastElementCoordinate = _measureElements.Count > 0 ? _measureElements[_measureElements.Count - 1].Intermediate : _baseElement.End;
bool first = _measureElements.Count == 0;
var newMeasureElement = new DimMeasureElement()
{
Base = _baseElement, Start = lastElementCoordinate, End = lastCoordinate, Transform = this.Transform, CoordinateSystem = this.CoordinateSystem, First = first, CSUnitsPerPixel = _csUnitsPerPixel
};
newMeasureElement.RecalculateCurvesAndAnnotations(true);
_measureElements.Add(newMeasureElement);
}
}
/// <summary>
/// Reverses the role of the base element
/// </summary>
internal void Reverse()
{
if (_measureElements.Count == 1)
{
var start = _baseElement.Start;
var end = _baseElement.End;
var distance = start.DistanceTo(end);
var angle = start.AngleTo(end);
var opposite = Coordinate.NewAtDistanceAngleFrom(start, distance * 2, angle);
_baseElement.Start = opposite;
_baseElement.RecalculateCurvesAndAnnotations(true);
}
}
